Are we sure the Nexus 7 2012 is running ART once it gets Lollipop?

[sniffs]

I have ART enabled on my HTC One M8. When I run some apps, it tells me that ART is not compatible and to go back to Dalvik.

I can run those SAME apps on my Nexus 7 with Lollipop and they run fine.. how can we know if we have ART or not?